In the folder list, select the just created account and click Server Settings. The incoming server settings for your account are displayed at the right part of the Account Settings window.

Under Security Settings select SSL.

In the folder list of the Account Setting window, click Outgoing Server (SMTP).
The Outgoing Server (SMTP) Settings are displayed at the right part of
the window. Here you can see all SMTP servers set up on your computer
(if there any).

Click Add. The SMTP Server dialog box is displayed. Fill out the form as follows:

In the Description field (optional), type in a free-form description of your outgoing mail server.

In the Server Name field, type auth.myhosting.com

Select the Use name and password checkbox and enter user@yourdomain.com in the User Name field.

Under Use secure connection select TLS.

Click OK to save changes and exit the SMTP Server dialog box.

Select your account ('Work Account') in the folder list of the Account Settings window. The account settings are displayed at the right part of the window.

From the Outgoing Server (SMTP) drop-down list, select the just added SMTP server.